From 61ddfa336db65ebdd14c0206c101a779abd5b7c3 Mon Sep 17 00:00:00 2001
From: Viktor Baranov <baranov.viktor.27@gmail.com>
Date: Mon, 2 Aug 2021 15:14:40 +0300
Subject: [PATCH] Fix Cannot read property toLowerCase of undefined

---
 CHANGELOG.md                                       | 1 +
 apps/block_scout_web/assets/js/lib/autocomplete.js | 9 ++++++---
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index d63454ee85..4b07feb627 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
 ### Features
 
 ### Fixes
+- [#4472](https://github.com/blockscout/blockscout/pull/4472) - Search autocomplete: Fix Cannot read property toLowerCase of undefined 
 - [#4456](https://github.com/blockscout/blockscout/pull/4456) - URL encoding for NFT media files URLs
 - [#4453](https://github.com/blockscout/blockscout/pull/4453) - Unescape characters for string output type in the contract response
 - [#4401](https://github.com/blockscout/blockscout/pull/4401) - Fix displaying of token holders with the same amount
diff --git a/apps/block_scout_web/assets/js/lib/autocomplete.js b/apps/block_scout_web/assets/js/lib/autocomplete.js
index 91abe306e2..89024bd5fb 100644
--- a/apps/block_scout_web/assets/js/lib/autocomplete.js
+++ b/apps/block_scout_web/assets/js/lib/autocomplete.js
@@ -43,9 +43,12 @@ const resultsListElement = (list, data) => {
   fetchTextAdData()
 }
 const searchEngine = (query, record) => {
-  if (record.name.toLowerCase().includes(query.toLowerCase()) ||
-        record.symbol.toLowerCase().includes(query.toLowerCase()) ||
-        record.contract_address_hash.toLowerCase().includes(query.toLowerCase())) {
+  if (record && (
+    (record.name && record.name.toLowerCase().includes(query.toLowerCase())) ||
+      (record.symbol && record.symbol.toLowerCase().includes(query.toLowerCase())) ||
+      (record.contract_address_hash && record.contract_address_hash.toLowerCase().includes(query.toLowerCase()))
+  )
+  ) {
     var searchResult = `${record.contract_address_hash}<br/>`
     if (record.type === 'label') {
       searchResult += `<div class="fontawesome-icon tag"></div><span> <b>${record.name}</b></span>`